Bug fix #14110 https://core.trac.wordpress.org/ticket/14110

Author: puggan

wp-includes/media.php

@@ -549,9 +549,9 @@ function wp_get_attachment_image($attachment_id, $size = 'thumbnail', $icon = fa
 $image = wp_get_attachment_image_src($attachment_id, $size, $icon);
 if ( $image ) {
 list($src, $width, $height) = $image;
-$hwstring = image_hwstring($width, $height);
 if ( is_array($size) )
 $size = join('x', $size);
+
 $attachment = get_post($attachment_id);
 $default_attr = array(
 'src'=> $src,
@@ -563,10 +563,14 @@ function wp_get_attachment_image($attachment_id, $size = 'thumbnail', $icon = fa
 if ( empty($default_attr['alt']) )
 $default_attr['alt'] = trim(strip_tags( $attachment->post_title )); // Finally, use the title
 
-$attr = wp_parse_args($attr, $default_attr);
+if($width) $default_attr['width'] = (int) $width;
+if($height) $default_attr['height'] = (int) $height;
+
+$attr = wp_parse_args( $attr, $default_attr );
+
 $attr = apply_filters( 'wp_get_attachment_image_attributes', $attr, $attachment );
 $attr = array_map( 'esc_attr', $attr );
-$html = rtrim("<img $hwstring");
+$html = rtrim("<img");
 foreach ( $attr as $name => $value ) {
 $html .= " $name=" . '"' . $value . '"';
 }